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Compartment (anatomy), a space of connective tissue between muscles •
Compartment (chemistry), in which different parts of the same protein molecule serve different functions •
Compartment (development), fields of cells of distinct cell lineage, cell affinity, and genetic identity •
Compartment (pharmacokinetics), a defined and distinct volume of body fluids •
Cellular compartment, a closed part within a cell, surrounded by a membrane ==Other uses==